<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        .case2 {
            height: 150px;
            background: red;
        }

        .case2-inner1 {
            margin-bottom: 50px;
        }

        .case2-inner2 {
            margin-top: 20px;
        }
    </style>
</head>

<body>
    <div class="case2">
        <div class="case2-inner1">hello1</div>
        <div class="case2-inner2">hello2</div>
    </div>


</body>

</html>